Services · Tax

Tax Planning and Compliance for Growing Businesses.

Section 174A research expensing, IRC 280E strategy for cannabis, multi-state nexus, entity structuring, and the deadline filings that carry real penalties. GreenGrowth CPAs is an AICPA member firm and PCAOB registered.

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AICPAMember firm, subject to peer review
PCAOBRegistered public accounting firm
Since 2016Specialist tax practice
1,500+Clients served nationwide
At a Glance

Tax planning and compliance splits into two very different jobs, and most firms only do one of them well. Compliance means filing accurately on what already happened. Planning means structuring decisions before they happen, so the return reflects choices you made deliberately. The money sits almost entirely on the planning side, yet most businesses only speak to their accountant once the year has closed.

Three areas currently move the numbers most. IRC Section 174A permanently restored immediate expensing of domestic research costs for tax years beginning after December 31, 2024, and it opened a recovery path for costs capitalised under the previous rule. IRC Section 280E still disallows ordinary deductions for cannabis operations, which makes cost of goods sold allocation the largest single lever available. And multi-state nexus now reaches businesses that never crossed a state line, following the Wayfair decision.

GreenGrowth CPAs was founded in 2016 and is headquartered at 200 Spectrum Center Drive in Irvine, California. The firm is an AICPA member firm and a PCAOB registered public accounting firm, serving clients nationwide across cannabis, technology, life sciences, real estate, professional services, and nonprofits.

Last reviewed and updated: August 2026

Not sure which of these applies to you?Tell us your entity type, states, and what you spend on. We will point at the one that moves your number most. Get a read on your position →

The Live Opportunity

Research Costs Are Deductible Again. Including Backwards.

The Tax Cuts and Jobs Act stopped businesses deducting research and experimental costs in the year spent, for tax years beginning after December 31, 2021. Capitalisation and amortisation applied instead. Software development counted, so the rule reached far beyond laboratories.

The One Big Beautiful Bill Act created IRC Section 174A. It permanently restored immediate expensing of domestic research costs for tax years beginning after December 31, 2024, and it left two recovery routes open for the years already capitalised.

Current spending deducts now

Domestic research and experimental costs are deductible in the year incurred. Software development counts explicitly, which covers engineer salaries and contract development.

Foreign research still amortises over fifteen years, so where the work happens has become a tax question rather than purely an operational one.

Two ways back to prior years

Any taxpayer may elect to deduct remaining unamortised domestic costs from the capitalised years, either fully in the first year under the new rule or spread across it and the following year.

Smaller taxpayers meeting the gross receipts test under Section 448(c) have a further route, amending those returns directly.

The credit interacts with it

Section 280C applies again for tax years beginning after December 31, 2024. You either claim the full research credit under Section 41 and reduce the Section 174A deduction, or make the 280C election for a reduced credit.

Modelling both is the work, and the answer shifts with your taxable income and loss position.

The transition is treated as a taxpayer-initiated accounting method change applied on a cut-off basis. Deductions generally beat net operating losses here, because post-2017 NOLs offset only 80 percent of taxable income. Confirm your position with your tax adviser before filing.

Did you capitalise research costs under the old rule?Most businesses that build software or products did, often without realising it was a choice. That money may still be recoverable. Check what you can recover →

What We Bring

Six Reasons Businesses Move Their Tax Work.

Planning, Not Just Filing

Quarterly conversations rather than one call in March, so entity changes, transactions, and major spend get evaluated while the decision is still open.

Research Cost Strategy

Section 174A elections, domestic versus foreign tracking, recovery of previously capitalised costs, and the Section 280C decision modelled against your position.

Cannabis and IRC 280E

Cost of goods sold allocation built on live cannabis engagements, where the disallowance makes classification the largest lever on the federal bill.

Multi-State Nexus

Where you have filing obligations, what registration each state requires, apportionment, and how to unwind exposure that has already accrued.

Entity Structure

Owner compensation, reasonable salary, distributions, and whether your current structure still fits the business you have rather than the one you started.

Deadline Filings

Form 990 for exempt organisations, Form 5500 for benefit plans, and extension filings, each carrying penalties that escalate rather than cap.

GreenGrowth CPAs is an AICPA member firm and PCAOB registered, serving clients nationwide from eight offices.

Which of these six is costing you the most right now?Most business owners have an instinct. A short call turns that instinct into a number. Talk it through →

Only speaking to your accountant at filing time?

By then every decision that mattered has already been made. Planning happens while the year is still open.

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Our Service Lines

Tax Planning and Compliance Services We Provide.

Six areas covering federal and state filing, individual returns for owners, dispute resolution, and the deadline filings that carry the steepest penalties.

Primary sources for the two deadline filings above: the IRS on automatic revocation of exempt status, and the Department of Labor on Form 5500 reporting and filing.

The Calendar

The Deadlines That Actually Bite.

Every filing has a due date. These are the ones we handle across the client base, stated as the rule rather than a single year's date, so the table stays accurate whatever year you read it in. Dates falling on a weekend or federal holiday move to the next business day.

Filing When What Missing It Costs
Partnership and S corporation returns The 15th day of the third month after year end. Calendar-year filers file March 15, or September 15 on extension A per-partner, per-month penalty that scales with the number of owners rather than the tax due.
C corporation returns The 15th day of the fourth month after year end. Calendar-year filers file April 15, or October 15 on extension Failure to file runs far steeper than failure to pay, so filing on time matters even when you cannot pay.
Individual returns April 15, or October 15 on extension. Owners and partners often wait on a K-1 before they can file A late K-1 pushes the owner's personal return late as well, which is why the two get planned together.
Trust and estate returns The 15th day of the fourth month after year end. Calendar-year filers file April 15, extended to September 30 Beneficiary K-1s flow through, so a late trust return delays every beneficiary's personal filing.
Estimated tax payments Quarterly, on the 15th day of the fourth, sixth and ninth months and the first month of the following year Underpayment interest that compounds quietly and is rarely abated.
Payroll tax returns Form 941 quarterly, by the last day of the month after each quarter. Form 940 annually by January 31 Trust fund taxes carry personal liability for responsible persons, which no entity structure shields.
Information returns Forms W-2 and 1099-NEC by January 31. Other 1099 series by February 28 on paper or March 31 electronically Per-form penalties that scale with volume and rise the longer the form goes unfiled.
Form 990 The 15th day of the fifth month after year end, with a six-month extension available on Form 8868 Three consecutive missed years triggers automatic revocation of exempt status.
Form 5500 The last day of the seventh month after plan year end, extended two and a half months on Form 5558 DOL penalties accrue daily with no maximum. The DFVCP reduces them sharply, but only before the DOL makes contact.
Sales and use tax Set by each state, commonly monthly, quarterly or annually depending on volume Uncollected tax becomes the seller's liability, and it surfaces in diligence when a buyer looks at nexus.
State franchise and annual reports Set by each state of formation and registration, with dates that rarely align to the federal calendar Administrative dissolution or loss of good standing, which can stall a financing or a sale.
Foreign information returns Filed with the income tax return. FinCEN Form 114 has its own April 15 date with an automatic extension to October 15 Forms 5471, 5472 and 8938 carry fixed penalties per form that start high and apply regardless of tax due.

Dates falling on a weekend or federal holiday move to the next business day. Fiscal-year filers follow the same rules from their own year end rather than the calendar-year dates shown.

Already past one of these?Late is a fixable problem when it is handled deliberately. It gets expensive when it is ignored. Talk to a CPA today →

Who We Serve

Sectors Where the Tax Rules Are the Hard Part.

Some businesses need a competent return. Others operate under a code section that reshapes the whole financial model. These are the second kind.

In one of these sectors?Open your industry above for the rules that apply to it, or skip ahead and tell us your situation. Talk to a specialist →

Why It Matters

Compliance Is a Floor. Planning Is the Return.

A competent preparer files a correct return. That is table stakes, and it is where most engagements stop. Three things separate a tax practice that changes your number from one that simply reports it.

Timing beats accuracy

By the time a return is prepared, every decision that moved the number has already happened. Entity elections, transaction structure, spend classification, and timing of income all had a window. That window closed at year end.

Quarterly contact is not a service upgrade. It is the only point at which advice can still change anything.

Sector rules are not optional extras

IRC 280E for cannabis, Section 174A for anyone building software or products, and passive activity rules for real estate each reshape the model rather than adjusting it at the edges.

A preparer meeting these once a year applies them cautiously and leaves money behind. Or aggressively, and the position does not survive examination.

Nexus follows people, not offices

Remote employees, online revenue, and marketplace sales create filing obligations in states you have never visited. The exposure accrues quietly until a notice arrives.

Most businesses discover this during diligence, when unwinding it is slowest and a buyer is watching.

When did your accountant last call you before a decision?If the answer is never, that is the gap. It is also the cheapest one to close. Start the conversation →

Planning a sale, a raise, or a restructure?

Tax structure decided before the transaction is worth multiples of what can be salvaged afterward.

Plan It Properly

Common Questions

Tax Planning and Compliance FAQs.

Planning versus compliance

What is the difference between tax planning and tax preparation?

Tax preparation is compliance work. It files an accurate return based on what already happened during the year. Tax planning is strategic work, structuring decisions, transactions, and timing while the year is still open. Most businesses receive both from their CPA, but the planning side carries almost all of the financial impact. Reactive preparation alone tends to miss opportunities that proactive planning would have captured, because by filing time those choices are closed.

Do you only help during tax season?

No, and a practice that does is limited to reporting rather than advising. We work through the year so decisions get evaluated in real time. That covers entity changes, major purchases, transactions, hiring across state lines, and anything with a timing element. Tax season then becomes an execution exercise rather than a year-end scramble, and the return reflects choices you made on purpose.

When should a business bring in a specialist tax CPA?

Usually at a complexity threshold rather than a revenue number. Multiple owners, operations in more than one state, or inventory each create questions a general preparer cannot answer well. So do research spend, a planned capital raise, and an industry with its own code section. A transaction on the horizon is the clearest trigger of all, since structure decided beforehand is worth far more than anything salvaged afterward.

Specific tax positions

What changed with Section 174 for research costs?

The Tax Cuts and Jobs Act required capitalisation and amortisation of research costs rather than deduction. That applied to tax years beginning after December 31, 2021. Software development counted, so the rule reached well beyond laboratories. The One Big Beautiful Bill Act then created IRC Section 174A. That permanently restored immediate expensing of domestic research costs for tax years beginning after December 31, 2024. Foreign research still amortises over fifteen years. Domestic and offshore work therefore need separate tracking.

Can we recover research costs capitalised under the old rule?

In most cases yes, through one of two routes. Any taxpayer may elect to deduct the remaining unamortised domestic costs. That election runs either in full in the first year under the new rule, or ratably across that year and the following one. Separately, smaller taxpayers meeting the gross receipts test under Section 448(c) may amend the affected returns directly. Which route delivers more depends on your taxable income and loss position. Post-2017 net operating losses offset only 80 percent of taxable income.

Can you help with multi-state tax issues?

Yes. We handle nexus analysis, state registration, apportionment, sales and use tax, and the ongoing compliance burden. Multi-state exposure grew sharply after the Wayfair decision. Many businesses now have filing obligations in states where they have no physical presence at all. Remote employees, online revenue, and marketplace sales each create nexus on their own terms. Where exposure has already accrued, we unwind it through voluntary disclosure rather than waiting for a notice.

Working with GreenGrowth CPAs

What tax services does GreenGrowth CPAs provide?

Federal tax planning and compliance, state and local tax, and individual returns for owners and partners. Then tax controversy and examination representation, plus deadline filings including Form 990 and Form 5500. Engagements run from a single project to an ongoing quarterly advisory relationship. Many clients pair tax work with outsourced CFO services, since the two questions usually arrive together.

Which industries do you specialise in?

Cannabis, technology and SaaS, life sciences, real estate, professional services, nonprofits, and PEOs. Each operates under rules that reshape the financial model rather than adjusting it at the margins. Examples include IRC 280E, Section 174A, passive activity limits, and unrelated business income. We also serve owners whose personal and business positions cannot be separated.

How do we move from our current accountant?

We start with an onboarding review covering prior-year returns, entity structure, and open notices. That surfaces both risk and missed opportunity, and it happens before you commit to anything. Next we request records from your existing accountant and agree a handover date. Most transitions happen between filing periods, though we regularly pick up mid-year where a return is outstanding or a deadline is at risk.

Still have a question this page did not answer?Ask it directly. A CPA reads every enquiry, and you get a straight answer whether or not we are the right fit. Ask a CPA →

Daniel Sabet, Cannabis CFO and Financial Advisor at GreenGrowth CPAs, a tax planning and compliance CPA firm in Irvine California

Meet Our Advisor

Daniel Sabet

Cannabis CFO and Financial Advisor

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Get Your Tax Position Reviewed.

Send us your entity type, the states you operate in, your industry, and what is coming next. We will come back with where the exposure sits, what is recoverable, and a scoped fee.

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